Convert List<Integer> to Array int[] - Java Collection Framework

Java examples for Collection Framework:Array Convert

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Description

Convert List<Integer> to Array int[]

Demo Code

/*/*from ww  w .  j a  va2s .c  o m*/
 * http://code.google.com/p/ametro/
 * Transport map viewer for Android platform
 * Copyright (C) 2009-2010 contacts@ametro.org Roman Golovanov and other
 * respective project committers (see project home page)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *  
 */
//package com.java2s;
import java.util.ArrayList;

import java.util.List;

public class Main {
    public static void main(String[] argv) {
        List src = java.util.Arrays.asList("asdf", "java2s.com");
        System.out.println(java.util.Arrays.toString(toArray(src)));
    }

    public static int[] toArray(List<Integer> src) {
        int[] res = new int[src.size()];
        for (int i = 0; i < src.size(); i++) {
            res[i] = src.get(i);
        }
        return res;
    }

    public static long[] toArray(ArrayList<Long> src) {
        long[] res = new long[src.size()];
        for (int i = 0; i < src.size(); i++) {
            res[i] = src.get(i);
        }
        return res;
    }
}

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